/**
 * KuchiKomi AI - Main Stylesheet
 *
 * This file contains the base styles for the KuchiKomi AI application.
 * Tailwind CSS will be used as the primary styling framework,
 * but this file provides custom styles and overrides.
 */

/* CSS Custom Properties (CSS Variables) */
:root {
    /* Primary brand colors */
    --color-primary: #2563eb;
    --color-primary-dark: #1d4ed8;
    --color-primary-light: #3b82f6;

    /* Secondary colors */
    --color-secondary: #10b981;
    --color-secondary-dark: #059669;

    /* Neutral colors */
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-800: #1f2937;
    --color-gray-900: #111827;

    /* Status colors */
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-error: #ef4444;
    --color-info: #3b82f6;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;

    /* Border radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-xl: 0.75rem;

    /* Transitions */
    --transition-fast: 150ms;
    --transition-normal: 300ms;
    --transition-slow: 500ms;
}

/* Base resets and defaults */
*, *::before, *::after {
    box-sizing: border-box;
}

html {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
                 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.5;
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    padding: 0;
    background-color: var(--color-gray-50);
    color: var(--color-gray-900);
}

/* Japanese font support */
html:lang(ja) {
    font-family: 'Inter', 'Hiragino Kaku Gothic ProN', 'Hiragino Sans',
                 'Noto Sans JP', 'Meiryo', sans-serif;
}

/* Utility classes */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}