:root{--color-primary:#3b82f6;--color-primary-dark:#2563eb;--color-primary-light:#93c5fd;--color-accent:#10b981;--color-accent-dark:#059669;--color-accent-light:#6ee7b7;--color-bg:#f9fafb;--color-surface:#fff;--color-border:#e5e7eb;--color-text:#111827;--color-text-secondary:#6b7280;--color-text-muted:#9ca3af;--color-success:#10b981;--color-warning:#f59e0b;--color-error:#ef4444;--color-info:#3b82f6;--space-xs:4px;--space-sm:8px;--space-md:16px;--space-lg:24px;--space-xl:32px;--space-2xl:48px;--space-3xl:64px;--radius-sm:4px;--radius-md:8px;--radius-lg:12px;--radius-full:9999px;--shadow-sm:0 1px 2px #0000000d;--shadow-md:0 4px 6px #00000012;--shadow-lg:0 10px 15px #0000001a;--font-sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;--font-mono:"Fira Code","Consolas",monospace}*,:before,:after{box-sizing:border-box;margin:0;padding:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif}html,body{max-width:100vw;overflow-x:hidden}body{font-family:var(--font-sans);color:var(--color-text);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background:linear-gradient(#f0f5ff 0%,#f9fafb 40%,#f0fdf9 100%);min-height:100vh;font-size:20px;line-height:1.6}a{color:var(--color-primary);text-decoration:none}a:hover{text-decoration:underline}.container{max-width:1200px;padding:0 var(--space-md);margin:0 auto}.btn{padding:var(--space-sm)var(--space-lg);border-radius:var(--radius-md);cursor:pointer;border:none;justify-content:center;align-items:center;font-size:18px;font-weight:600;transition:background-color .2s,transform .1s;display:inline-flex}.btn:active{transform:scale(.98)}.btn-primary{background-color:var(--color-primary);color:#fff}.btn-primary:hover{background-color:var(--color-primary-dark)}.btn-accent{background-color:var(--color-accent);color:#fff}.btn-accent:hover{background-color:var(--color-accent-dark)}.btn-outline{border:2px solid var(--color-primary);color:var(--color-primary);background-color:#0000}.btn-outline:hover{background-color:var(--color-primary);color:#fff}.card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:var(--space-lg);box-shadow:var(--shadow-sm)}.text-secondary{color:var(--color-text-secondary)}.text-muted{color:var(--color-text-muted)}