: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: 11px;
  --font-size-sm: 12px;
  --font-size-base: 14px;
  --font-size-md: 14px;
  --font-size-lg: 16px;
  --font-size-xl: 18px;
  --font-size-2xl: 20px;
  --font-size-3xl: 24px;
  --font-size-4xl: 30px;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 550;
  --font-weight-bold: 600;
  --line-height-tight: 1.2;
  --line-height-normal: 1.5;
  --letter-spacing-tight: -0.01em;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

/* Base styles */
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 */
:root {
  /* Primary Gradient Colors */
  --primary-blue: #4169E1;
  --primary-violet: #8B00FF;
  --accent-cyan: #00D4FF;
  
  /* Light Mode */
  --bg: #FFFFFF;
  --surface: #F8FAFB;
  --card: #FAFBFC;
  --text-primary: #1A1F36;
  --text-secondary: #5B6B79;
  --border: rgba(94, 82, 64, 0.2);
  --border-light: rgba(94, 82, 64, 0.1);
  --shadow-sm: 0 4px 12px rgba(65, 105, 225, 0.15);
  --shadow-md: 0 8px 24px rgba(65, 105, 225, 0.2);
  --shadow-lg: 0 12px 36px rgba(65, 105, 225, 0.25);
  
  /* Glass Effect */
  --glass-bg: rgba(255, 255, 255, 0.85);
  --glass-border: rgba(255, 255, 255, 0.3);
  --glass-shadow: 0 8px 32px rgba(65, 105, 225, 0.3);
  
  /* Animations */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --duration-fast: 150ms;
  --duration-normal: 300ms;
  --duration-slow: 500ms;
  
  /* Status Colors */
  --success: #10B981;
  --error: #EF4444;
  --warning: #F59E0B;
  --info: #0EA5E9;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --bg: #0F1419;
    --surface: #1A202C;
    --card: #1F2937;
    --text-primary: #F3F4F6;
    --text-secondary: #D1D5DB;
    --border: rgba(119, 124, 124, 0.3);
    --border-light: rgba(119, 124, 124, 0.15);
    --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 12px 36px rgba(0, 0, 0, 0.6);
    --glass-bg: rgba(31, 41, 55, 0.85);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
    --primary-blue: #60A5FA;
    --accent-cyan: #22D3EE;
  }
}

[data-theme="dark"] {
  --bg: #0F1419;
  --surface: #1A202C;
  --card: #1F2937;
  --text-primary: #F3F4F6;
  --text-secondary: #D1D5DB;
  --border: rgba(119, 124, 124, 0.3);
  --border-light: rgba(119, 124, 124, 0.15);
  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 12px 36px rgba(0, 0, 0, 0.6);
  --glass-bg: rgba(31, 41, 55, 0.85);
  --glass-border: rgba(255, 255, 255, 0.1);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
  --primary-blue: #60A5FA;
  --accent-cyan: #22D3EE;
}

[data-theme="light"] {
  --bg: #FFFFFF;
  --surface: #F8FAFB;
  --card: #FAFBFC;
  --text-primary: #1A1F36;
  --text-secondary: #5B6B79;
  --border: rgba(94, 82, 64, 0.2);
  --border-light: rgba(94, 82, 64, 0.1);
  --shadow-sm: 0 4px 12px rgba(65, 105, 225, 0.15);
  --shadow-md: 0 8px 24px rgba(65, 105, 225, 0.2);
  --shadow-lg: 0 12px 36px rgba(65, 105, 225, 0.25);
  --glass-bg: rgba(255, 255, 255, 0.85);
  --glass-border: rgba(255, 255, 255, 0.3);
  --glass-shadow: 0 8px 32px rgba(65, 105, 225, 0.3);
  --primary-blue: #4169E1;
  --primary-violet: #8B00FF;
  --accent-cyan: #00D4FF;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  height: 100%;
  overflow-x: hidden;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text-primary);
  line-height: 1.6;
  transition: background var(--duration-normal) var(--ease);
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Poppins', sans-serif;
  font-weight: 600;
  letter-spacing: -0.02em;
}

/* Glass Header */
.glass-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  box-shadow: var(--shadow-sm);
  transition: all var(--duration-normal) var(--ease);
}

.header-content {
  max-width: 1600px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo-section {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo-text {
  font-family: 'Poppins', sans-serif;
  font-size: 1.75rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary-blue), var(--primary-violet));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.02em;
}

.pro-badge {
  background: linear-gradient(135deg, var(--primary-blue), var(--primary-violet));
  color: white;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.25rem 0.5rem;
  border-radius: 6px;
  letter-spacing: 0.05em;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.icon-btn {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  cursor: pointer;
  color: var(--text-primary);
  transition: all var(--duration-fast) var(--ease);
  text-decoration: none;
}

.icon-btn:hover {
  background: var(--primary-blue);
  color: white;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.sun-icon { display: block; }
.moon-icon { display: none; }

@media (prefers-color-scheme: dark) {
  .sun-icon { display: none; }
  .moon-icon { display: block; }
}

/* Main App Container */
.app-container {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  padding: 2rem;
  max-width: 1600px;
  margin: 0 auto;
  min-height: calc(100vh - 100px);
}

@media (min-width: 1280px) {
  .app-container {
    grid-template-columns: 320px 1fr 320px;
  }
}

@media (min-width: 768px) and (max-width: 1279px) {
  .app-container {
    grid-template-columns: 280px 1fr;
  }
}

/* Glass Panels */
.glass-panel {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: 24px;
  box-shadow: var(--glass-shadow);
  overflow: hidden;
  transition: all var(--duration-normal) var(--ease);
  animation: slideIn var(--duration-normal) var(--ease);
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.control-panel {
  max-height: calc(100vh - 140px);
  display: flex;
  flex-direction: column;
}

.download-panel {
  max-height: calc(100vh - 140px);
  display: flex;
  flex-direction: column;
}

.panel-scroll {
  overflow-y: auto;
  padding: 1.5rem;
  flex: 1;
}

.panel-scroll::-webkit-scrollbar {
  width: 8px;
}

.panel-scroll::-webkit-scrollbar-track {
  background: transparent;
}

.panel-scroll::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 4px;
}

.panel-scroll::-webkit-scrollbar-thumb:hover {
  background: var(--text-secondary);
}

/* Control Sections */
.control-section {
  margin-bottom: 1.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-light);
}

.control-section:last-child {
  border-bottom: none;
}

.section-title {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.collapsible-header {
  cursor: pointer;
  user-select: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: color var(--duration-fast) var(--ease);
}

.collapsible-header:hover {
  color: var(--primary-blue);
}

.collapse-icon {
  font-size: 0.8rem;
  transition: transform var(--duration-normal) var(--ease);
}

.collapsible.collapsed .collapse-icon {
  transform: rotate(-90deg);
}

.collapsible.collapsed .collapsible-content {
  display: none;
}

.label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
  margin-top: 0.75rem;
}

/* Input Field */
.input-wrapper {
  position: relative;
}

.input-field {
  width: 100%;
  padding: 0.875rem;
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: 12px;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.95rem;
  resize: vertical;
  min-height: 100px;
  transition: all var(--duration-fast) var(--ease);
}

.input-field:focus {
  outline: none;
  border-color: var(--primary-blue);
  box-shadow: 0 0 0 3px rgba(65, 105, 225, 0.1);
}

.input-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 0.5rem;
  font-size: 0.8rem;
}

.char-count {
  color: var(--text-secondary);
}

.encoding-badge {
  background: var(--surface);
  padding: 0.25rem 0.5rem;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--primary-blue);
}

.capacity-bar {
  height: 4px;
  background: var(--surface);
  border-radius: 2px;
  margin-top: 0.5rem;
  overflow: hidden;
}

.capacity-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--success), var(--primary-blue));
  border-radius: 2px;
  transition: width var(--duration-normal) var(--ease), background var(--duration-normal) var(--ease);
}

.capacity-fill.warning {
  background: linear-gradient(90deg, var(--warning), var(--error));
}

/* Option Groups */
.option-group {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.5rem;
}

.option-btn {
  padding: 0.625rem;
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease);
}

.option-btn:hover {
  border-color: var(--primary-blue);
  background: var(--primary-blue);
  color: white;
  transform: translateY(-2px);
}

.option-btn.active {
  background: linear-gradient(135deg, var(--primary-blue), var(--primary-violet));
  border-color: var(--primary-blue);
  color: white;
  box-shadow: var(--shadow-sm);
}

/* Style Grid */
.style-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.5rem;
}

.style-btn {
  aspect-ratio: 1;
  padding: 0.75rem;
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: 10px;
  font-size: 1.5rem;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease);
  display: flex;
  align-items: center;
  justify-content: center;
}

.style-btn:hover {
  border-color: var(--primary-blue);
  transform: scale(1.05);
}

.style-btn.active {
  background: linear-gradient(135deg, var(--primary-blue), var(--primary-violet));
  border-color: var(--primary-blue);
  color: white;
  box-shadow: var(--shadow-sm);
}

/* Color Controls */
.color-controls {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.color-input-group {
  display: flex;
  flex-direction: column;
}

.color-picker {
  width: 100%;
  height: 50px;
  border: 2px solid var(--border);
  border-radius: 10px;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease);
}

.color-picker:hover {
  border-color: var(--primary-blue);
  transform: scale(1.02);
}

/* Slider */
.slider {
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: var(--surface);
  outline: none;
  -webkit-appearance: none;
  margin: 0.5rem 0;
}

.slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary-blue), var(--primary-violet));
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: all var(--duration-fast) var(--ease);
}

.slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
  box-shadow: var(--shadow-md);
}

.slider::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary-blue), var(--primary-violet));
  cursor: pointer;
  border: none;
  box-shadow: var(--shadow-sm);
}

/* Gradient Toggle */
.gradient-toggle {
  margin-top: 1rem;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  font-size: 0.9rem;
  color: var(--text-primary);
}

.checkbox-label input[type="checkbox"] {
  width: 18px;
  height: 18px;
  cursor: pointer;
}

.gradient-controls {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-light);
}

/* Logo Upload Area */
.upload-area {
  position: relative;
  border: 2px dashed var(--border);
  border-radius: 12px;
  padding: 2rem;
  text-align: center;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease);
  background: var(--surface);
}

.upload-area:hover {
  border-color: var(--primary-blue);
  background: var(--card);
}

.upload-prompt {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-secondary);
}

.upload-prompt svg {
  color: var(--primary-blue);
}

.upload-prompt p {
  margin: 0;
  font-weight: 500;
  color: var(--text-primary);
}

.upload-hint {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.logo-preview-box {
  position: relative;
  margin-top: 1rem;
  padding: 1rem;
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.logo-preview-box img {
  max-width: 80px;
  max-height: 80px;
  object-fit: contain;
}

.remove-btn {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  width: 28px;
  height: 28px;
  background: var(--error);
  color: white;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  transition: all var(--duration-fast) var(--ease);
}

.remove-btn:hover {
  transform: scale(1.1);
  box-shadow: var(--shadow-md);
}

.logo-controls {
  margin-top: 1rem;
}

.scannability-indicator {
  margin-top: 1rem;
  padding: 0.75rem;
  border-radius: 10px;
  font-size: 0.85rem;
  font-weight: 500;
  text-align: center;
}

.scannability-indicator.success {
  background: rgba(16, 185, 129, 0.15);
  color: var(--success);
  border: 1px solid var(--success);
}

.scannability-indicator.warning {
  background: rgba(245, 158, 11, 0.15);
  color: var(--warning);
  border: 1px solid var(--warning);
}

.scannability-indicator.error {
  background: rgba(239, 68, 68, 0.15);
  color: var(--error);
  border: 1px solid var(--error);
}

/* Preview Panel */
.preview-panel {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  min-height: 600px;
}

.preview-container {
  position: relative;
  width: 100%;
  max-width: 500px;
}

.qr-canvas-wrapper {
  position: relative;
  width: 100%;
  aspect-ratio: 1;
  background: white;
  border-radius: 24px;
  box-shadow: var(--glass-shadow);
  overflow: hidden;
  border: 1px solid var(--glass-border);
  animation: qrPulse 3s ease-in-out infinite;
}

@keyframes qrPulse {
  0%, 100% {
    box-shadow: var(--glass-shadow);
  }
  50% {
    box-shadow: 0 12px 48px rgba(65, 105, 225, 0.4);
  }
}

#qr-canvas, #logo-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

#logo-canvas {
  pointer-events: none;
}

.loading-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.95);
  border-radius: 24px;
  z-index: 10;
  gap: 1rem;
}

@media (prefers-color-scheme: dark) {
  .loading-overlay {
    background: rgba(31, 41, 55, 0.95);
  }
}

.spinner {
  width: 50px;
  height: 50px;
  border: 4px solid var(--surface);
  border-top-color: var(--primary-blue);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.loading-overlay p {
  margin: 0;
  color: var(--text-secondary);
  font-weight: 500;
}

.error-banner {
  margin-top: 1rem;
  padding: 1rem;
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid var(--error);
  border-radius: 12px;
  color: var(--error);
  font-size: 0.9rem;
  text-align: center;
  animation: shake 0.4s ease-in-out;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-10px); }
  75% { transform: translateX(10px); }
}

/* Download Panel */
.panel-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 1.25rem;
  color: var(--text-primary);
}

.download-buttons {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

/* Download Section Styles */
.download-section {
  margin-bottom: 1.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-light);
}

/* Quality Selector */
.quality-selector {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.quality-selector .label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 0;
}

.quality-buttons {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
}

.quality-btn {
  padding: 0.75rem;
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.8rem;
  color: var(--text-primary);
}

.quality-btn:hover {
  border-color: var(--primary-blue);
  background: var(--card);
  transform: translateY(-2px);
}

.quality-btn.active {
  background: linear-gradient(135deg, var(--primary-blue), var(--primary-violet));
  color: white;
  border-color: var(--primary-blue);
  box-shadow: var(--shadow-sm);
}

.quality-label {
  font-weight: 600;
  font-size: 0.9rem;
}

.quality-info {
  font-size: 0.7rem;
  opacity: 0.85;
}

/* Format Buttons */
.format-buttons {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.download-format-btn {
  padding: 1rem 0.75rem;
  background: linear-gradient(135deg, var(--primary-blue), var(--primary-violet));
  color: white;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.85rem;
  transition: all var(--duration-fast) var(--ease);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.375rem;
}

.download-format-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 16px rgba(65, 105, 225, 0.3);
}

.download-format-btn:active {
  transform: translateY(0);
}

.download-format-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

/* Info Text */
.download-info {
  padding: 0.75rem;
  background: rgba(65, 105, 225, 0.05);
  border: 1px solid rgba(65, 105, 225, 0.1);
  border-radius: 8px;
  font-size: 0.75rem;
  color: var(--text-secondary);
  line-height: 1.4;
  text-align: center;
}

.download-info p {
  margin: 0;
}

.download-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 1rem;
  border: none;
  border-radius: 12px;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  color: white;
  transition: all var(--duration-fast) var(--ease);
  position: relative;
  overflow: hidden;
}

.download-btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.download-btn:hover::before {
  width: 300px;
  height: 300px;
}

.download-btn:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.download-btn:active {
  transform: translateY(-1px);
}

.btn-png {
  background: linear-gradient(135deg, #4169E1, #2E5DC8);
}

.btn-svg {
  background: linear-gradient(135deg, #10B981, #059669);
}

.btn-jpeg {
  background: linear-gradient(135deg, #F59E0B, #D97706);
}

.stats-section {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-light);
}

.stats-title {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.stat-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.625rem 0;
  border-bottom: 1px solid var(--border-light);
}

.stat-item:last-child {
  border-bottom: none;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.stat-value {
  font-size: 0.9rem;
  color: var(--text-primary);
  font-weight: 600;
  font-family: 'Poppins', sans-serif;
}

/* Theme Grid */
.theme-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
  margin-top: 0.75rem;
}

.theme-card {
  padding: 0.75rem;
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: 10px;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease);
  text-align: center;
}

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

.theme-card.active {
  border-color: var(--primary-blue);
  background: linear-gradient(135deg, var(--primary-blue), var(--primary-violet));
  color: white;
  box-shadow: var(--shadow-md);
}

.theme-preview {
  width: 100%;
  height: 60px;
  border-radius: 6px;
  margin-bottom: 0.5rem;
}

.theme-name {
  font-size: 0.8rem;
  font-weight: 600;
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  top: 100px;
  right: 2rem;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  pointer-events: none;
}

.toast {
  padding: 1rem 1.25rem;
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  box-shadow: var(--shadow-lg);
  color: var(--text-primary);
  font-size: 0.9rem;
  font-weight: 500;
  min-width: 250px;
  animation: slideInRight var(--duration-normal) var(--ease);
  pointer-events: auto;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.toast.success {
  border-left: 4px solid var(--success);
}

.toast.error {
  border-left: 4px solid var(--error);
}

.toast.warning {
  border-left: 4px solid var(--warning);
}

.toast.info {
  border-left: 4px solid var(--info);
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(100px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* Responsive Design */
@media (max-width: 1279px) {
  .download-panel {
    display: none;
  }
  
  .app-container {
    grid-template-columns: 280px 1fr;
  }
}

@media (max-width: 767px) {
  .header-content {
    padding: 1rem;
  }
  
  .logo-text {
    font-size: 1.5rem;
  }
  
  .app-container {
    grid-template-columns: 1fr;
    padding: 1rem;
    gap: 1rem;
  }
  
  .control-panel,
  .download-panel {
    max-height: none;
  }
  
  .preview-panel {
    padding: 1rem;
    min-height: 400px;
  }
  
  .qr-canvas-wrapper {
    max-width: 100%;
  }
  
  .toast-container {
    right: 1rem;
    left: 1rem;
    top: 80px;
  }
  
  .toast {
    min-width: auto;
  }
  
  .theme-grid {
    grid-template-columns: 1fr;
  }
  
  .option-group {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (max-width: 767px) {
  .color-palette-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  
  .gradient-direction-buttons {
    grid-template-columns: repeat(4, 1fr);
  }
  
  .preset-gradients-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .multiplier-buttons {
    grid-template-columns: 1fr;
  }
  
  .modal-content {
    width: 95%;
    max-height: 95vh;
  }
  
  .modal-header,
  .modal-body,
  .modal-footer {
    padding: 1rem;
  }
  
  .shape-buttons {
    grid-template-columns: 1fr;
  }
  
  .download-buttons {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
  }
  
  .download-btn {
    width: 100%;
  }
}

@media (max-width: 1279px) {
  .download-panel {
    display: block;
  }
}

@media (max-width: 767px) {
  .format-buttons {
    grid-template-columns: 1fr;
  }
  
  .quality-buttons {
    grid-template-columns: 1fr 1fr;
  }
  
  .download-format-btn {
    padding: 0.875rem;
  }
  
  .border-type-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .smart-color-detection {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .neon-color-buttons {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .border-shape-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .size-presets {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .color-mode-selector {
    grid-template-columns: 1fr;
  }
  
  .quick-colors {
    grid-template-columns: repeat(4, 1fr);
  }
  
  .preview-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .color-controls {
    grid-template-columns: 1fr;
  }
  
  .border-type-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .style-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  
  .custom-color-input {
    grid-template-columns: 50px 1fr;
  }
  
  .format-content {
    gap: 0.75rem;
    padding: 0.75rem;
  }
  
  .format-icon {
    font-size: 1.5rem;
  }
}

/* Smart Border Section */
.smart-border-section {
  background: linear-gradient(135deg, rgba(65, 105, 225, 0.05), rgba(139, 0, 255, 0.05));
  border: 1px solid rgba(65, 105, 225, 0.2);
  border-radius: 12px;
  padding: 1rem;
  margin-top: 1rem;
}

.control-group {
  margin-bottom: 0.75rem;
}

.control-group small {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* Border Shape Grid */
.border-shape-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.border-shape-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.375rem;
  padding: 0.5rem;
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease);
  font-size: 0.75rem;
  color: var(--text-primary);
}

.border-shape-btn:hover {
  border-color: var(--primary-blue);
  transform: translateY(-2px);
}

.border-shape-btn.active {
  border-color: var(--primary-blue);
  background: rgba(65, 105, 225, 0.1);
}

.border-shape-btn svg {
  color: var(--text-primary);
}

.border-shape-btn span {
  font-weight: 500;
}

/* Size Presets */
.size-presets {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0.375rem;
  margin-top: 0.5rem;
}

.preset-size {
  padding: 0.375rem;
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: 6px;
  font-size: 0.7rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease);
  color: var(--text-primary);
}

.preset-size:hover {
  border-color: var(--primary-blue);
}

.preset-size.active {
  background: linear-gradient(135deg, var(--primary-blue), var(--primary-violet));
  border-color: var(--primary-blue);
  color: white;
}

/* Color Mode Selector */
.color-mode-selector {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.color-mode-btn {
  padding: 0.5rem;
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: 6px;
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease);
  color: var(--text-primary);
}

.color-mode-btn:hover {
  border-color: var(--primary-blue);
}

.color-mode-btn.active {
  background: linear-gradient(135deg, var(--primary-blue), var(--primary-violet));
  border-color: var(--primary-blue);
  color: white;
}

/* Quick Colors */
.quick-colors {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 0.5rem;
}

.quick-color,
.quick-bg-color {
  width: 100%;
  aspect-ratio: 1;
  border-radius: 6px;
  cursor: pointer;
  border: 2px solid var(--border);
  transition: all var(--duration-fast) var(--ease);
}

.quick-color:hover,
.quick-bg-color:hover {
  transform: scale(1.1);
  box-shadow: var(--shadow-sm);
}

.quick-color.active,
.quick-bg-color.active {
  border-color: var(--primary-blue);
  border-width: 3px;
  box-shadow: 0 0 0 2px rgba(65, 105, 225, 0.2);
}

/* Smart Match Options */
.smart-match-options {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

/* Effects Checkboxes */
.effects-checkboxes {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

/* Smart Recommendation Box */
.smart-recommendation-box {
  padding: 0.75rem;
  background: rgba(59, 130, 246, 0.05);
  border-left: 3px solid var(--primary-blue);
  border-radius: 6px;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.smart-recommendation-box strong {
  color: var(--text-primary);
}

.smart-recommendation-box p {
  margin: 0;
}

.smart-recommendation-box p:first-child {
  margin-bottom: 0.25rem;
}

/* Border Preview Section */
.border-preview-section {
  padding: 0.75rem;
  background: var(--surface);
  border-radius: 8px;
}

.border-preview-section > p {
  margin: 0 0 0.75rem 0;
  font-weight: 600;
  color: var(--text-primary);
}

.preview-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
}

.preview-item {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.preview-item p {
  margin: 0 0 0.5rem 0;
  font-weight: 500;
  color: var(--text-secondary);
}

.preview-item canvas {
  width: 100%;
  height: auto;
  border: 1px solid var(--border);
  border-radius: 8px;
}

.smart-border-title {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.detection-status {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.3);
  border-radius: 8px;
  color: var(--success);
  font-size: 0.85rem;
  margin-bottom: 0.75rem;
}

.detection-status .status-icon {
  font-size: 1.1rem;
  font-weight: bold;
}

.border-type-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
  margin-top: 0.75rem;
}

.border-type-btn {
  padding: 0.625rem 0.5rem;
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.75rem;
  color: var(--text-primary);
}

.border-type-btn:hover {
  border-color: var(--primary-blue);
  transform: translateY(-2px);
}

.border-type-btn.active {
  border-color: var(--primary-blue);
  background: rgba(65, 105, 225, 0.1);
}

.border-preview {
  width: 36px;
  height: 36px;
  border-radius: 4px;
  background: var(--surface);
}

.border-preview.solid {
  border: 3px solid var(--text-primary);
}

.border-preview.glow {
  border: 2px solid var(--primary-blue);
  box-shadow: 0 0 8px rgba(65, 105, 225, 0.6);
}

.border-preview.double {
  border: 2px solid var(--primary-blue);
  box-shadow: inset 0 0 0 2px var(--surface), inset 0 0 0 4px var(--text-primary);
}

.border-preview.gradient {
  background: linear-gradient(45deg, #4169E1, #8B00FF);
}

.border-preview.shadow {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.border-preview.neon {
  border: 2px solid #00FF00;
  box-shadow: 0 0 12px rgba(0, 255, 0, 0.8);
  background: rgba(0, 255, 0, 0.1);
}

.width-presets {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.375rem;
  margin-top: 0.5rem;
}

.preset-width {
  padding: 0.375rem;
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease);
  color: var(--text-primary);
}

.preset-width:hover {
  border-color: var(--primary-blue);
}

.preset-width.active {
  background: linear-gradient(135deg, var(--primary-blue), var(--primary-violet));
  border-color: var(--primary-blue);
  color: white;
}

.smart-color-detection {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.smart-color-btn {
  padding: 0.5rem;
  border: 2px solid var(--border);
  background: var(--surface);
  border-radius: 6px;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease);
  font-size: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 36px;
}

.smart-color-btn:hover {
  border-color: var(--primary-blue);
}

.smart-color-btn.active {
  border-color: var(--primary-blue);
  background: rgba(65, 105, 225, 0.1);
}

.color-swatch {
  width: 24px;
  height: 24px;
  border-radius: 4px;
}

.auto-label,
.custom-label {
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.75rem;
}

.gradient-color-inputs {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 0.5rem;
}

.neon-color-buttons {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.neon-btn {
  padding: 0.5rem;
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease);
  color: var(--text-primary);
}

.neon-btn:hover {
  border-color: var(--primary-blue);
}

.neon-btn.active {
  background: linear-gradient(135deg, var(--primary-blue), var(--primary-violet));
  border-color: var(--primary-blue);
  color: white;
}

.smart-recommendations {
  padding: 0.75rem;
  background: rgba(59, 130, 246, 0.05);
  border-left: 3px solid var(--primary-blue);
  border-radius: 6px;
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: 0.75rem;
}

.smart-recommendations strong {
  color: var(--text-primary);
}

.smart-recommendations p {
  margin: 0;
}

.smart-recommendations p:first-child {
  margin-bottom: 0.25rem;
}

.border-preview-container {
  margin-top: 0.75rem;
  padding: 0.75rem;
  background: var(--surface);
  border-radius: 8px;
  text-align: center;
}

.border-preview-container p {
  margin: 0 0 0.5rem 0;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
}

#logo-with-border-preview {
  margin: 0 auto;
  display: block;
}

/* Accessibility */
:focus-visible {
  outline: 2px solid var(--primary-blue);
  outline-offset: 2px;
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* Dark mode QR canvas */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) .qr-canvas-wrapper {
    background: #FFFFFF;
  }
}

[data-theme="dark"] .qr-canvas-wrapper {
  background: #FFFFFF;
}

[data-theme="light"] .qr-canvas-wrapper {
  background: white;
}

/* Theme icon visibility */
[data-theme="dark"] .sun-icon {
  display: none;
}

[data-theme="dark"] .moon-icon {
  display: block;
}

[data-theme="light"] .sun-icon {
  display: block;
}

[data-theme="light"] .moon-icon {
  display: none;
}

/* Smooth scrolling */
html {
  scroll-behavior: smooth;
}

/* Selection */
::selection {
  background: var(--primary-blue);
  color: white;
}