:root {
    /* Brand: Sky Blue (週末出遊) + Adventure Orange (行動呼籲) */
    --color-primary: #0EA5E9;
    --color-primary-hover: #0284C7;
    --color-secondary: #F97316;
    --color-secondary-hover: #EA580C;
    --color-bg: #ffffff;
    --color-bg-secondary: #F0F9FF;
    --color-text: #0C4A6E;
    --color-text-secondary: #64748b;
    --color-text-muted: #94a3b8;
    --color-border: #e2e8f0;
    --color-success: #22c55e;
    --color-warning: #f59e0b;
    --color-error: #ef4444;
    --color-tag-bg: #F0F9FF;
    --color-tag-text: #0369A1;
    --color-free-bg: #ecfdf5;
    --color-free-text: #059669;
    --color-highlight-bg: #FFF7ED;
    --color-highlight-text: #C2410C;

    /* Typography: Noto Sans TC for Chinese readability */
    --font-sans: 'Noto Sans TC', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-display: 'Noto Serif TC', 'Noto Sans TC', serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3.5rem;
    --font-size-6xl: 4.5rem;

    /* Overlay */
    --color-overlay-dark: rgba(12, 74, 110, 0.7);
    --color-overlay-gradient: linear-gradient(to top, rgba(0,0,0,0.85) 0%, rgba(0,0,0,0.4) 40%, transparent 70%);

    /* Mosaic */
    --color-mosaic-bg: #080B10;
    --color-mosaic-gap: #0F1318;
    --mosaic-gap: 2px;

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

    /* Borders & Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.1);

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

@media (prefers-reduced-motion: reduce) {
    :root {
        --transition-fast: 0ms;
        --transition-normal: 0ms;
    }
    .skeleton { animation: none !important; }
}