:root{--color-bg:#0f172a;--color-bg-elevated:#1e293b;--color-surface:#fff;--color-surface-muted:#f8fafc;--color-border:#e2e8f0;--color-text:#0f172a;--color-text-muted:#64748b;--color-text-on-dark:#f1f5f9;--color-primary:#2563eb;--color-primary-hover:#1d4ed8;--color-primary-text:#fff;--color-danger:#dc2626;--color-success:#16a34a;--radius-sm:6px;--radius-md:10px;--radius-lg:16px;--shadow-sm:0 1px 2px #0f172a0f;--shadow-md:0 6px 16px #0f172a14;--font-sans:-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Apple SD Gothic Neo", "Malgun Gothic", "Noto Sans KR", sans-serif}*{box-sizing:border-box}html,body{min-height:100%;margin:0;padding:0}body{font-family:var(--font-sans);background:var(--color-surface-muted);color:var(--color-text);-webkit-font-smoothing:antialiased;font-size:15px;line-height:1.5}a{color:inherit;text-decoration:none}button{cursor:pointer;font-family:inherit}input,button{font-size:inherit}