:root{font-family:system-ui,-apple-system,Segoe UI,sans-serif;line-height:1.5;color-scheme:light dark;color:#0f172a;background:#f8fafc}*{box-sizing:border-box}html,body,#root{margin:0;min-height:100vh}a{color:#2563eb;text-decoration:none}a:hover{text-decoration:underline}button{font:inherit;cursor:pointer}.k-page{max-width:960px;margin:0 auto;padding:24px 16px 64px}.k-card{background:#fff;border:1px solid #e2e8f0;border-radius:12px;padding:24px;box-shadow:0 1px 2px #0f172a0a}.k-header{display:flex;align-items:center;justify-content:space-between;padding:16px 24px;border-bottom:1px solid #e2e8f0;background:#fff}.k-header h1{font-size:18px;margin:0;font-weight:600}.k-muted{color:#64748b}.k-error{color:#b91c1c;background:#fef2f2;border:1px solid #fecaca;padding:8px 12px;border-radius:8px;margin-top:12px}