:root{--color-bg:#ffffff;--color-surface:#f7f7f8;--color-text:#16181d;--color-text-muted:#6b7280;--color-border:#e5e7eb;--color-primary:#2563eb;--color-primary-hover:#1d4ed8;--color-primary-text:#ffffff;--color-danger:#dc2626;--color-success:#16a34a;--color-warning:#d97706;--radius-sm:6px;--radius-md:10px;--radius-lg:16px;--space-1:4px;--space-2:8px;--space-3:12px;--space-4:16px;--space-5:24px;--space-6:32px;--space-7:48px;--font-size-caption:13px;--font-size-body:16px;--font-size-h3:18px;--font-size-h2:22px;--font-size-h1:28px;--bottom-nav-height:64px}*{box-sizing:border-box}body,html{margin:0;padding:0;background:var(--color-bg);color:var(--color-text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Helvetica Neue,sans-serif;font-size:var(--font-size-body);line-height:1.5;-webkit-font-smoothing:antialiased;-webkit-tap-highlight-color:transparent}a{color:var(--color-primary);text-decoration:none}button{font-family:inherit}input,select,textarea{font-family:inherit;font-size:inherit}