:root{--color-background:#fdfdfd;--color-surface:#f7f7f7;--color-text:#1a1a1a;--color-text-secondary:#666;--color-accent:orange;--color-border:#eaeaea;--color-border-subtle:#f0f0f0;--font-family-sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;--spacing-unit:8px;--border-radius:8px}[data-theme=dark]{--color-background:#0a0a0a;--color-surface:#1a1a1a;--color-text:#e5e5e5;--color-text-secondary:#a0a0a0;--color-accent:orange;--color-border:#2a2a2a;--color-border-subtle:#1f1f1f}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html,body{height:100%}body{background-color:var(--color-background);color:var(--color-text);font-family:var(--font-family-sans);flex-direction:column;min-height:100vh;line-height:1.7;transition:background-color .3s,color .3s;display:flex}main{flex-direction:column;flex-grow:1;width:100%;display:flex;position:relative}a{color:inherit;text-decoration:none;transition:color .2s}button{font-family:inherit}.container{width:100%;max-width:1100px;margin:0 auto;padding:0 1.5rem}