:root{--primary-color: #0066cc;--primary-light: #3399ff;--primary-dark: #004499;--secondary-color: #00c851;--accent-color: #ff6b35;--background-color: #ffffff;--surface-color: #f8f9fa;--border-color: #e9ecef;--text-primary: #2d3748;--text-secondary: #718096;--text-muted: #a0aec0;--success-color: #38a169;--warning-color: #ed8936;--error-color: #e53e3e;--info-color: #3182ce;--solar-yellow: #ffd700;--ai-purple: #805ad5;--education-blue: #4299e1;--spacing-xs: .25rem;--spacing-sm: .5rem;--spacing-md: 1rem;--spacing-lg: 1.5rem;--spacing-xl: 2rem;--spacing-2xl: 3rem;--font-size-xs: .75rem;--font-size-sm: .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;--border-radius-sm: .25rem;--border-radius-md: .5rem;--border-radius-lg: 1rem;--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .05);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .1);--shadow-lg: 0 10px 15px -3px rgb(0 0 0 / .1);--transition-fast: .15s ease-in-out;--transition-normal: .3s ease-in-out;--transition-slow: .5s ease-in-out}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;line-height:1.5;-webkit-text-size-adjust:100%;tab-size:4;scroll-behavior:smooth}body{background-color:var(--background-color);color:var(--text-primary);font-size:var(--font-size-base);min-height:100vh;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}:focus-visible{outline:2px solid var(--primary-color);outline-offset:2px}