:root{--color-primary:#06c;--color-primary-dark:#0052a3;--color-secondary:#4a90e2;--color-accent:#ff6b35;--color-success:#00a651;--color-warning:orange;--color-error:#d32f2f;--color-bg-primary:#fff;--color-bg-secondary:#f8f9fa;--color-bg-tertiary:#e9ecef;--color-text-primary:#212529;--color-text-secondary:#6c757d;--color-text-inverse:#fff;--color-border:#dee2e6;--color-border-light:#e9ecef;--shadow-sm:0 1px 2px rgba(0,0,0,.05);--shadow-md:0 4px 6px rgba(0,0,0,.1);--shadow-lg:0 10px 15px rgba(0,0,0,.1);--radius-sm:4px;--radius-md:8px;--radius-lg:12px;--spacing-xs:0.25rem;--spacing-sm:0.5rem;--spacing-md:1rem;--spacing-lg:1.5rem;--spacing-xl:2rem;--spacing-2xl:3rem;--font-body:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;--font-heading:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Oxygen,Ubuntu,Cantarell,sans-serif}*{box-sizing:border-box;margin:0;padding:0}body,html{font-family:var(--font-body);background:var(--color-bg-primary);line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body,h1,h2,h3,h4,h5,h6,html{color:var(--color-text-primary)}h1,h2,h3,h4,h5,h6{font-family:var(--font-heading);font-weight:600;line-height:1.2}h1{font-size:2.5rem}h2{font-size:2rem}h3{font-size:1.5rem}h4{font-size:1.25rem}a{color:var(--color-primary);text-decoration:none;transition:color .2s}a:hover{color:var(--color-primary-dark);text-decoration:underline}button{font-family:var(--font-body);cursor:pointer}ul{list-style:none}@media (max-width:768px){h1{font-size:2rem}h2{font-size:1.5rem}h3{font-size:1.25rem}}