:root{--bg:#f8fafc;--fg:#0f172a;--muted:#64748b;--primary:#2563eb;--primary-hover:#1d4ed8;--border:#e2e8f0;--card-bg:#fff;--danger:#dc2626;--success:#16a34a;--radius:12px}*{box-sizing:border-box;margin:0;padding:0}body,html{max-width:100vw;overflow-x:hidden;background:var(--bg);color:var(--fg);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif}a{color:var(--primary);text-decoration:none}.container{max-width:960px;margin:0 auto;padding:0 24px}.btn{display:inline-block;padding:10px 18px;border-radius:var(--radius);border:1px solid var(--border);background:var(--card-bg);cursor:pointer;font-size:15px;transition:all .15s ease}.btn-primary{background:var(--primary);color:#fff;border-color:var(--primary)}.btn-primary:hover{background:var(--primary-hover)}.card{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);padding:20px}.muted{color:var(--muted)}