: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;
/* FIXED: Changed from overflow: hidden to allow vertical scrolling */
overflow-x: hidden;
height: 100vh;
background: linear-gradient(135deg, var(--color-bg-1) 0%, var(--color-bg-2) 100%);
font-family: var(--font-family-base);
}

*,
*::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 */

/* Theme Toggle Styles */
.theme-toggle {
position: fixed;
top: var(--space-20);
right: var(--space-20);
z-index: 1000;
}

.theme-toggle-btn {
width: 60px;
height: 30px;
background: var(--color-border);
border: 2px solid var(--color-border);
border-radius: var(--radius-full);
cursor: pointer;
position: relative;
transition: all 0.3s var(--ease-standard);
overflow: hidden;
padding: 0;
}

.theme-toggle-btn:hover {
background: var(--color-secondary);
box-shadow: var(--shadow-md);
}

.toggle-slider {
position: absolute;
width: 24px;
height: 24px;
background: var(--color-surface);
border-radius: 50%;
top: 2px;
left: 2px;
transition: transform 0.3s var(--ease-standard);
display: flex;
align-items: center;
justify-content: center;
box-shadow: var(--shadow-sm);
}

.toggle-icon {
position: absolute;
font-size: 12px;
transition: opacity 0.3s var(--ease-standard);
}

.sun-icon {
opacity: 1;
}

.moon-icon {
opacity: 0;
}

/* Dark theme toggle state */
[data-theme="dark"] .toggle-slider {
transform: translateX(30px);
}

[data-theme="dark"] .sun-icon {
opacity: 0;
}

[data-theme="dark"] .moon-icon {
opacity: 1;
}

/* Dark Theme Variables */
[data-theme="dark"] {
--color-background: #1a1a2e;
--color-surface: #16213e;
--color-text: #eee;
--color-text-secondary: #bbb;
--color-primary: #6c7ce7;
--color-primary-hover: #5a6fd8;
--color-primary-active: #4861c9;
--color-success: #27ae60;
--color-error: #e74c3c;
--color-warning: #f39c12;
--color-info: #3498db;
--color-border: #34495e;
--color-secondary: #2c3e50;
--color-secondary-hover: #34495e;
--color-secondary-active: #3d566e;
--color-btn-primary-text: #fff;
--color-card-border: #34495e;
--color-card-border-inner: #2c3e50;
--color-focus-ring: rgba(108, 124, 231, 0.4);

/* Dark theme background colors */
--color-bg-1: rgba(52, 152, 219, 0.15);
--color-bg-2: rgba(241, 196, 15, 0.15);
--color-bg-3: rgba(46, 204, 113, 0.15);
--color-bg-4: rgba(231, 76, 60, 0.15);
--color-bg-5: rgba(155, 89, 182, 0.15);
--color-bg-6: rgba(230, 126, 34, 0.15);
--color-bg-7: rgba(233, 30, 99, 0.15);
--color-bg-8: rgba(26, 188, 156, 0.15);

/* Shadows for dark theme */
--shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.3);
--shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4), 0 1px 2px rgba(0, 0, 0, 0.3);
--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -2px rgba(0, 0, 0, 0.4);
}

/* Smooth theme transitions */
* {
transition: background-color 0.3s var(--ease-standard),
color 0.3s var(--ease-standard),
border-color 0.3s var(--ease-standard),
box-shadow 0.3s var(--ease-standard);
}

/* Animated Background Elements */
.background-elements {
position: fixed;
top: 0;
left: 0;
width: 100%;
height: 100%;
pointer-events: none;
z-index: -1;
}

.floating-shape {
position: absolute;
border-radius: 50%;
opacity: 0.1;
animation: float 6s ease-in-out infinite;
}

.shape-1 {
width: 80px;
height: 80px;
background: var(--color-primary);
top: 20%;
left: 10%;
animation-delay: 0s;
}

.shape-2 {
width: 60px;
height: 60px;
background: var(--color-success);
top: 60%;
right: 15%;
animation-delay: 2s;
}

.shape-3 {
width: 100px;
height: 100px;
background: var(--color-warning);
bottom: 20%;
left: 20%;
animation-delay: 4s;
}

.shape-4 {
width: 70px;
height: 70px;
background: var(--color-error);
top: 30%;
right: 30%;
animation-delay: 1s;
}

@keyframes float {
0%, 100% { transform: translateY(0px) rotate(0deg); }
25% { transform: translateY(-20px) rotate(90deg); }
50% { transform: translateY(-40px) rotate(180deg); }
75% { transform: translateY(-20px) rotate(270deg); }
}

/* Screen Management - FIXED: Added scrolling capability */
.screen {
position: absolute;
top: 0;
left: 0;
width: 100%;
min-height: 100vh; /* Changed from height: 100vh */
display: flex;
align-items: center;
justify-content: center;
opacity: 0;
visibility: hidden;
transform: scale(0.9);
transition: all 0.5s var(--ease-standard);
overflow-y: auto; /* FIXED: Add vertical scrolling */
padding: var(--space-20) 0; /* FIXED: Add padding for better spacing */
}

.screen.active {
opacity: 1;
visibility: visible;
transform: scale(1);
}

.container {
max-width: 800px;
width: 100%;
padding: var(--space-32);
text-align: center;
}

/* Welcome Screen Styles */
.welcome-content {
animation: slideInUp 0.8s var(--ease-standard);
}

.game-title {
font-size: 4rem;
font-weight: var(--font-weight-bold);
margin-bottom: var(--space-16);
color: var(--color-text);
}

.title-word {
display: inline-block;
animation: bounceIn 0.8s var(--ease-standard);
}

.title-word:nth-child(1) { animation-delay: 0.1s; }
.title-word:nth-child(2) { animation-delay: 0.2s; }
.title-word:nth-child(3) { animation-delay: 0.3s; }

.accent-word {
color: var(--color-primary);
position: relative;
}

.accent-word::after {
content: '';
position: absolute;
bottom: -5px;
left: 0;
width: 100%;
height: 4px;
background: linear-gradient(90deg, var(--color-primary), var(--color-primary-hover));
border-radius: 2px;
animation: expandWidth 1s ease-out 0.5s both;
}

.subtitle {
font-size: 1.5rem;
color: var(--color-text-secondary);
margin-bottom: var(--space-32);
font-weight: var(--font-weight-medium);
}

.game-info {
display: flex;
justify-content: center;
gap: var(--space-32);
margin-bottom: var(--space-32);
}

.info-item {
background: var(--color-surface);
border-radius: var(--radius-lg);
padding: var(--space-20);
box-shadow: var(--shadow-md);
border: 1px solid var(--color-border);
transition: transform 0.3s var(--ease-standard);
animation: slideInUp 0.6s var(--ease-standard);
}

.info-item:nth-child(1) { animation-delay: 0.2s; }
.info-item:nth-child(2) { animation-delay: 0.3s; }
.info-item:nth-child(3) { animation-delay: 0.4s; }

.info-item:hover {
transform: translateY(-5px);
}

.info-number {
font-size: 2rem;
font-weight: var(--font-weight-bold);
color: var(--color-primary);
}

.info-label {
font-size: 0.9rem;
color: var(--color-text);
margin-top: var(--space-4);
}

.best-score-display {
background: linear-gradient(135deg, var(--color-primary), var(--color-primary-hover));
color: var(--color-btn-primary-text);
border-radius: var(--radius-lg);
padding: var(--space-20);
margin-bottom: var(--space-32);
box-shadow: var(--shadow-lg);
animation: pulse 2s infinite;
}

.best-score-label {
font-size: 1rem;
opacity: 0.9;
margin-bottom: var(--space-8);
}

.best-score-value {
font-size: 2.5rem;
font-weight: var(--font-weight-bold);
}

/* Enhanced Button Styles */
.btn {
position: relative;
overflow: hidden;
min-width: 120px;
min-height: 48px;
border: none;
cursor: pointer;
font-weight: var(--font-weight-semibold);
text-transform: uppercase;
letter-spacing: 0.5px;
transition: all 0.3s var(--ease-standard);
}

.btn--large {
padding: var(--space-16) var(--space-32);
font-size: 1.2rem;
min-height: 56px;
}

.btn--primary {
background: linear-gradient(135deg, var(--color-primary), var(--color-primary-hover));
color: var(--color-btn-primary-text);
box-shadow: 0 4px 15px rgba(108, 124, 231, 0.3);
}

.btn--primary:hover {
transform: translateY(-2px);
box-shadow: 0 6px 20px rgba(108, 124, 231, 0.4);
}

.btn-ripple {
position: absolute;
border-radius: 50%;
background: rgba(255, 255, 255, 0.3);
transform: scale(0);
animation: ripple 0.6s linear;
}

@keyframes ripple {
to {
transform: scale(4);
opacity: 0;
}
}

.instructions {
margin-top: var(--space-32);
color: var(--color-text-secondary);
font-size: 0.9rem;
}

.instructions p {
margin-bottom: var(--space-8);
}

/* Game Screen Styles */
.game-header {
display: flex;
justify-content: space-between;
align-items: center;
margin-bottom: var(--space-32);
background: var(--color-surface);
border-radius: var(--radius-lg);
padding: var(--space-20);
box-shadow: var(--shadow-md);
border: 1px solid var(--color-border);
}

.game-stats {
display: flex;
gap: var(--space-24);
}

.stat-item {
text-align: center;
}

.stat-value {
font-size: 1.5rem;
font-weight: var(--font-weight-bold);
color: var(--color-primary);
}

.stat-label {
font-size: 0.8rem;
color: var(--color-text-secondary);
margin-top: var(--space-4);
}

.timer-container {
position: relative;
width: 120px;
}

.timer-bg {
width: 100%;
height: 8px;
background: var(--color-secondary);
border-radius: 4px;
overflow: hidden;
}

.timer-progress {
height: 100%;
background: linear-gradient(90deg, var(--color-success), var(--color-primary));
border-radius: 4px;
transition: width 0.1s linear;
animation: pulse-progress 1s infinite;
}

.timer-text {
text-align: center;
margin-top: var(--space-8);
font-weight: var(--font-weight-bold);
color: var(--color-text);
}

@keyframes pulse-progress {
0%, 100% { opacity: 1; }
50% { opacity: 0.7; }
}

.game-content {
background: var(--color-surface);
border-radius: var(--radius-lg);
padding: var(--space-32);
box-shadow: var(--shadow-lg);
border: 1px solid var(--color-border);
animation: slideInUp 0.5s var(--ease-standard);
}

.question-display {
font-size: 4rem;
font-weight: var(--font-weight-bold);
margin-bottom: var(--space-32);
color: var(--color-text);
animation: scaleIn 0.5s var(--ease-standard);
}

.number {
color: var(--color-primary);
margin: 0 var(--space-8);
display: inline-block;
animation: bounceIn 0.6s var(--ease-standard);
}

.operator, .equals {
color: var(--color-warning);
margin: 0 var(--space-16);
}

.question-mark {
color: var(--color-error);
animation: pulse 1s infinite;
}

.answer-section {
display: flex;
flex-direction: column;
align-items: center;
gap: var(--space-16);
margin-bottom: var(--space-32);
}

/* NEW: Multiple Choice Options Styles */
.multiple-choice-options {
display: grid;
grid-template-columns: 1fr 1fr;
gap: var(--space-16);
width: 100%;
max-width: 300px;
margin-bottom: var(--space-16);
}

.option-btn {
padding: var(--space-16) var(--space-24);
font-size: 2rem;
font-weight: var(--font-weight-bold);
border: 3px solid var(--color-border);
border-radius: var(--radius-lg);
background: var(--color-background);
color: var(--color-text);
cursor: pointer;
transition: all 0.3s var(--ease-standard);
min-height: 80px;
display: flex;
align-items: center;
justify-content: center;
position: relative;
overflow: hidden;
}

.option-btn:hover:not(.selected):not(.disabled) {
border-color: var(--color-primary);
background: var(--color-surface);
transform: translateY(-2px);
box-shadow: var(--shadow-md);
}

.option-btn:focus {
outline: none;
border-color: var(--color-primary);
box-shadow: 0 0 0 3px var(--color-focus-ring);
}

.option-btn.selected {
background: linear-gradient(135deg, var(--color-primary), var(--color-primary-hover));
color: var(--color-btn-primary-text);
border-color: var(--color-primary);
transform: scale(1.05);
animation: bounceIn 0.5s var(--ease-standard);
}

.option-btn.correct {
background: linear-gradient(135deg, var(--color-success), #27ae60);
color: var(--color-btn-primary-text);
border-color: var(--color-success);
animation: bounceIn 0.5s var(--ease-standard);
}

.option-btn.incorrect {
background: linear-gradient(135deg, var(--color-error), #c0392b);
color: var(--color-btn-primary-text);
border-color: var(--color-error);
animation: shake 0.5s var(--ease-standard);
}

.option-btn.disabled {
pointer-events: none;
opacity: 0.6;
}

.auto-eval-hint {
font-size: 0.9rem;
color: var(--color-text-secondary);
background: var(--color-bg-3);
padding: var(--space-8) var(--space-16);
border-radius: var(--radius-full);
border: 1px solid var(--color-border);
animation: pulse 2s infinite;
}

#countdown-text {
font-weight: var(--font-weight-bold);
color: var(--color-primary);
}

.feedback {
padding: var(--space-16);
border-radius: var(--radius-lg);
font-weight: var(--font-weight-semibold);
display: flex;
align-items: center;
justify-content: center;
gap: var(--space-12);
transition: all 0.3s var(--ease-standard);
}

.feedback.correct {
background: rgba(39, 174, 96, 0.15);
color: var(--color-success);
border: 2px solid rgba(39, 174, 96, 0.3);
animation: bounceIn 0.5s var(--ease-standard);
}

.feedback.incorrect {
background: rgba(231, 76, 60, 0.15);
color: var(--color-error);
border: 2px solid rgba(231, 76, 60, 0.3);
animation: shake 0.5s var(--ease-standard);
}

.feedback-icon {
font-size: 1.5rem;
}

/* Results Screen Styles */
.results-content {
animation: slideInUp 0.8s var(--ease-standard);
background: var(--color-surface);
border-radius: var(--radius-lg);
padding: var(--space-32);
box-shadow: var(--shadow-lg);
border: 1px solid var(--color-border);
}

.results-header {
margin-bottom: var(--space-32);
}

.results-title {
font-size: 2.5rem;
color: var(--color-text);
margin-bottom: var(--space-16);
}

.celebration-icon {
font-size: 3rem;
animation: bounce 1s infinite;
}

.score-display {
display: flex;
justify-content: center;
gap: var(--space-32);
margin-bottom: var(--space-32);
}

.final-score, .accuracy-display {
background: linear-gradient(135deg, var(--color-primary), var(--color-primary-hover));
color: var(--color-btn-primary-text);
border-radius: var(--radius-lg);
padding: var(--space-24);
text-align: center;
box-shadow: var(--shadow-md);
animation: scaleIn 0.6s var(--ease-standard);
}

.accuracy-display {
background: linear-gradient(135deg, var(--color-success), var(--color-primary));
animation-delay: 0.2s;
}

.score-label, .accuracy-label {
font-size: 0.9rem;
opacity: 0.9;
margin-bottom: var(--space-8);
}

.score-value, .accuracy-value {
font-size: 2.5rem;
font-weight: var(--font-weight-bold);
margin-bottom: var(--space-4);
}

.score-max {
font-size: 0.8rem;
opacity: 0.8;
}

.performance-rating {
background: rgba(39, 174, 96, 0.15);
border: 2px solid rgba(39, 174, 96, 0.3);
border-radius: var(--radius-lg);
padding: var(--space-20);
margin-bottom: var(--space-32);
animation: pulse 2s infinite;
}

.rating-text {
font-size: 1.2rem;
font-weight: var(--font-weight-semibold);
color: var(--color-success);
}

.score-comparison {
display: flex;
justify-content: center;
gap: var(--space-24);
margin-bottom: var(--space-32);
}

.comparison-item {
background: var(--color-bg-1);
border-radius: var(--radius-lg);
padding: var(--space-16);
text-align: center;
box-shadow: var(--shadow-sm);
border: 1px solid var(--color-border);
}

.comparison-label {
font-size: 0.8rem;
color: var(--color-text-secondary);
margin-bottom: var(--space-4);
}

.comparison-value {
font-size: 1.5rem;
font-weight: var(--font-weight-bold);
color: var(--color-primary);
}

/* Mistakes Review Styles */
.mistakes-review {
background: var(--color-bg-4);
border-radius: var(--radius-lg);
padding: var(--space-24);
margin-bottom: var(--space-32);
border: 1px solid var(--color-border);
animation: slideInUp 0.8s var(--ease-standard);
animation-delay: 0.3s;
}

.mistakes-title {
font-size: 1.5rem;
color: var(--color-text);
margin-bottom: var(--space-16);
text-align: center;
}

.mistakes-list {
display: flex;
flex-direction: column;
gap: var(--space-12);
}

.mistake-item {
background: var(--color-surface);
border-radius: var(--radius-base);
padding: var(--space-12) var(--space-16);
border: 1px solid var(--color-card-border);
display: flex;
align-items: center;
justify-content: space-between;
font-size: var(--font-size-sm);
}

.mistake-question {
font-weight: var(--font-weight-semibold);
color: var(--color-text);
}

.mistake-answers {
display: flex;
gap: var(--space-16);
align-items: center;
}

.user-answer {
color: var(--color-error);
font-weight: var(--font-weight-medium);
}

.correct-answer {
color: var(--color-success);
font-weight: var(--font-weight-medium);
}

.no-mistakes {
text-align: center;
color: var(--color-success);
font-size: 1.1rem;
font-weight: var(--font-weight-semibold);
padding: var(--space-20);
}

/* Animations */
@keyframes slideInUp {
from {
opacity: 0;
transform: translateY(30px);
}
to {
opacity: 1;
transform: translateY(0);
}
}

@keyframes bounceIn {
0% {
opacity: 0;
transform: scale(0.3);
}
50% {
opacity: 1;
transform: scale(1.05);
}
70% {
transform: scale(0.9);
}
100% {
opacity: 1;
transform: scale(1);
}
}

@keyframes scaleIn {
from {
opacity: 0;
transform: scale(0.8);
}
to {
opacity: 1;
transform: scale(1);
}
}

@keyframes shake {
0%, 100% { transform: translateX(0); }
10%, 30%, 50%, 70%, 90% { transform: translateX(-5px); }
20%, 40%, 60%, 80% { transform: translateX(5px); }
}

@keyframes bounce {
0%, 20%, 53%, 80%, 100% {
transform: translateY(0);
}
40%, 43% {
transform: translateY(-20px);
}
70% {
transform: translateY(-10px);
}
90% {
transform: translateY(-4px);
}
}

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

@keyframes expandWidth {
from { width: 0; }
to { width: 100%; }
}

@keyframes floatUp {
0% {
opacity: 1;
transform: translateY(0) rotate(0deg);
}
100% {
opacity: 0;
transform: translateY(-200px) rotate(360deg);
}
}

/* Utility Classes */
.hidden {
opacity: 0 !important;
visibility: hidden !important;
transform: scale(0.9) !important;
}

/* Responsive Design */
@media (max-width: 768px) {
.theme-toggle {
top: var(--space-16);
right: var(--space-16);
}

.game-title {
font-size: 2.5rem;
}

.question-display {
font-size: 2.5rem;
}

.game-info {
flex-direction: column;
gap: var(--space-16);
}

.score-display {
flex-direction: column;
gap: var(--space-16);
}

.game-header {
flex-direction: column;
gap: var(--space-16);
}

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

.multiple-choice-options {
max-width: 250px;
}

.option-btn {
font-size: 1.5rem;
min-height: 60px;
padding: var(--space-12) var(--space-16);
}

.mistake-item {
flex-direction: column;
align-items: flex-start;
gap: var(--space-8);
}

.mistake-answers {
align-self: stretch;
justify-content: space-between;
}
}

/* High contrast mode */
@media (prefers-contrast: high) {
.btn--primary {
background: var(--color-text);
border: 2px solid var(--color-background);
}

.option-btn {
border-width: 3px;
}
}