/**
 * LibreUtils Design System - CSS Variables
 * 
 * Japanese Noble Purple inspired palette.
 * Primary: #613E9C (Noble Purple)
 * Accent: #D3381C (Vermillion Red)
 * Background: #FFFFFF (Pure White)
 * Muted: #B6BEE0 (Soft Lavender)
 */

:root {
    /* Primary Colors - Noble Purple */
    --lu-primary-50: #f5f3f9;
    --lu-primary-100: #ebe6f3;
    --lu-primary-200: #d7cce7;
    --lu-primary-300: #c3b3db;
    --lu-primary-400: #9a7bc0;
    --lu-primary-500: #613E9C;
    --lu-primary-600: #57388c;
    --lu-primary-700: #4a2f76;
    --lu-primary-800: #3d2761;
    --lu-primary-900: #2f1e4a;
    --lu-primary-950: #1f1432;

    /* Accent Colors - Vermillion Red */
    --lu-accent-400: #e04d33;
    --lu-accent-500: #D3381C;
    --lu-accent-600: #b83018;

    /* Neutral Colors - Clean grays with slight warmth */
    --lu-gray-50: #fafafa;
    --lu-gray-100: #f5f5f5;
    --lu-gray-200: #eeeeee;
    --lu-gray-300: #e0e0e0;
    --lu-gray-400: #bdbdbd;
    --lu-gray-500: #9e9e9e;
    --lu-gray-600: #757575;
    --lu-gray-700: #616161;
    --lu-gray-800: #424242;
    --lu-gray-900: #212121;
    --lu-gray-950: #121212;

    /* Lavender accent */
    --lu-lavender: #B6BEE0;
    --lu-lavender-light: #e8ebf5;
    --lu-lavender-dark: #8a94c0;

    /* Semantic Colors */
    --lu-success: #2e7d32;
    --lu-success-light: #e8f5e9;
    --lu-error: #c62828;
    --lu-error-light: #ffebee;

    /* Typography */
    --lu-font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --lu-font-mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', Monaco, monospace;

    --lu-text-xs: 0.75rem;
    --lu-text-sm: 0.875rem;
    --lu-text-base: 1rem;
    --lu-text-lg: 1.125rem;
    --lu-text-xl: 1.25rem;
    --lu-text-2xl: 1.5rem;
    --lu-text-3xl: 1.875rem;
    --lu-text-4xl: 2.25rem;

    /* Spacing */
    --lu-space-1: 0.25rem;
    --lu-space-2: 0.5rem;
    --lu-space-3: 0.75rem;
    --lu-space-4: 1rem;
    --lu-space-5: 1.25rem;
    --lu-space-6: 1.5rem;
    --lu-space-8: 2rem;
    --lu-space-10: 2.5rem;
    --lu-space-12: 3rem;
    --lu-space-16: 4rem;

    /* Border Radius */
    --lu-radius-sm: 0.25rem;
    --lu-radius-md: 0.5rem;
    --lu-radius-lg: 0.75rem;
    --lu-radius-xl: 1rem;
    --lu-radius-full: 9999px;

    /* Shadows */
    --lu-shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --lu-shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.08);
    --lu-shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.08);

    /* Transitions */
    --lu-transition-fast: 150ms ease;
    --lu-transition-normal: 250ms ease;

    /* Light Theme (Default) */
    --lu-bg-primary: #ffffff;
    --lu-bg-secondary: #fafafa;
    --lu-bg-card: #ffffff;
    --lu-text-primary: #212121;
    --lu-text-secondary: #616161;
    --lu-text-muted: #9e9e9e;
    --lu-border: #eeeeee;
    --lu-border-strong: #e0e0e0;
}

/* Dark Theme - Applied via class */
.lu-theme-dark {
    --lu-bg-primary: #121212;
    --lu-bg-secondary: #1e1e1e;
    --lu-bg-card: #252525;
    --lu-text-primary: #fafafa;
    --lu-text-secondary: #bdbdbd;
    --lu-text-muted: #757575;
    --lu-border: #333333;
    --lu-border-strong: #424242;
    --lu-shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.3);
    --lu-success-light: rgba(46, 125, 50, 0.15);
    --lu-error-light: rgba(198, 40, 40, 0.15);
    --lu-lavender-light: rgba(182, 190, 224, 0.15);
}

/* Also support system preference as fallback */
@media (prefers-color-scheme: dark) {
    :root:not(.lu-theme-light) {
        --lu-bg-primary: #121212;
        --lu-bg-secondary: #1e1e1e;
        --lu-bg-card: #252525;
        --lu-text-primary: #fafafa;
        --lu-text-secondary: #bdbdbd;
        --lu-text-muted: #757575;
        --lu-border: #333333;
        --lu-border-strong: #424242;
        --lu-shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.3);
        --lu-success-light: rgba(46, 125, 50, 0.15);
        --lu-error-light: rgba(198, 40, 40, 0.15);
        --lu-lavender-light: rgba(182, 190, 224, 0.15);
    }
}/**
 * LibreUtils Base Styles
 */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--lu-font-sans);
    font-size: var(--lu-text-base);
    line-height: 1.5;
    color: var(--lu-text-primary);
    background-color: var(--lu-bg-primary);
    min-height: 100vh;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 600;
    line-height: 1.25;
    color: var(--lu-text-primary);
}

h1 {
    font-size: var(--lu-text-4xl);
}

h2 {
    font-size: var(--lu-text-3xl);
}

h3 {
    font-size: var(--lu-text-2xl);
}

h4 {
    font-size: var(--lu-text-xl);
}

a {
    color: var(--lu-primary-500);
    text-decoration: none;
    transition: color var(--lu-transition-fast);
}

a:hover {
    color: var(--lu-primary-600);
}

code,
pre {
    font-family: var(--lu-font-mono);
    font-size: 0.9em;
}

code {
    background: var(--lu-bg-secondary);
    padding: 0.2em 0.4em;
    border-radius: var(--lu-radius-sm);
}

:focus-visible {
    outline: 2px solid var(--lu-primary-500);
    outline-offset: 2px;
}

::selection {
    background-color: var(--lu-primary-200);
    color: var(--lu-primary-900);
}

@media (prefers-color-scheme: dark) {
    ::selection {
        background-color: var(--lu-primary-700);
        color: var(--lu-primary-100);
    }
}

.lu-container {
    width: 100%;
    max-width: 1200px;
    margin-inline: auto;
    padding-inline: var(--lu-space-4);
}

@media (min-width: 768px) {
    .lu-container {
        padding-inline: var(--lu-space-6);
    }
}

.lu-sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}/**
 * LibreUtils Component Styles
 */

/* Buttons */
.lu-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--lu-space-2);
    padding: var(--lu-space-2) var(--lu-space-4);
    font-family: inherit;
    font-size: var(--lu-text-sm);
    font-weight: 500;
    line-height: 1;
    border: none;
    border-radius: var(--lu-radius-md);
    cursor: pointer;
    transition: all var(--lu-transition-fast);
}

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

.lu-btn-primary {
    background: linear-gradient(135deg, var(--lu-primary-500), var(--lu-primary-600));
    color: white;
    box-shadow: var(--lu-shadow-sm);
}

.lu-btn-primary:hover:not(:disabled) {
    background: linear-gradient(135deg, var(--lu-primary-600), var(--lu-primary-700));
    box-shadow: var(--lu-shadow-md);
    transform: translateY(-1px);
}

.lu-btn-secondary {
    background: var(--lu-bg-card);
    color: var(--lu-text-primary);
    border: 1px solid var(--lu-border);
}

.lu-btn-secondary:hover:not(:disabled) {
    background: var(--lu-bg-secondary);
    border-color: var(--lu-border-strong);
}

/* Cards */
.lu-card {
    background: var(--lu-bg-card);
    border: 1px solid var(--lu-border);
    border-radius: var(--lu-radius-lg);
    padding: var(--lu-space-6);
    transition: all var(--lu-transition-normal);
}

.lu-card-interactive:hover {
    border-color: var(--lu-primary-300);
    box-shadow: var(--lu-shadow-md);
    transform: translateY(-2px);
}

/* Inputs */
.lu-input {
    width: 100%;
    padding: var(--lu-space-3) var(--lu-space-4);
    font-family: inherit;
    font-size: var(--lu-text-base);
    color: var(--lu-text-primary);
    background: var(--lu-bg-card);
    border: 1px solid var(--lu-border);
    border-radius: var(--lu-radius-md);
    transition: all var(--lu-transition-fast);
}

.lu-input:focus {
    outline: none;
    border-color: var(--lu-primary-500);
    box-shadow: 0 0 0 3px var(--lu-primary-100);
}

@media (prefers-color-scheme: dark) {
    .lu-input:focus {
        box-shadow: 0 0 0 3px var(--lu-primary-900);
    }
}

.lu-input::placeholder {
    color: var(--lu-text-muted);
}

/* Labels */
.lu-label {
    display: block;
    margin-bottom: var(--lu-space-2);
    font-size: var(--lu-text-sm);
    font-weight: 500;
    color: var(--lu-text-secondary);
}

/* Badges */
.lu-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--lu-space-1);
    padding: var(--lu-space-1) var(--lu-space-2);
    font-size: var(--lu-text-xs);
    font-weight: 500;
    border-radius: var(--lu-radius-full);
    background: var(--lu-bg-secondary);
    color: var(--lu-text-secondary);
}

.lu-badge-primary {
    background: var(--lu-primary-100);
    color: var(--lu-primary-700);
}

.lu-badge-success {
    background: var(--lu-success-light);
    color: var(--lu-success);
}