*{box-sizing:border-box}body{margin:0;font-family:Segoe UI,system-ui,sans-serif;background:#f7f8fb;color:#0f172a}button{cursor:pointer}.container{max-width:900px;margin:0 auto;padding:24px}.card{background:#fff;border:1px solid #e5e7eb;border-radius:10px;padding:16px;box-shadow:0 10px 30px #0f172a0f}.list{display:grid;gap:12px}.flex{display:flex;gap:12px;align-items:center}input,select{padding:10px 12px;border:1px solid #d1d5db;border-radius:8px;width:100%}button.primary{background:#0ea5e9;border:none;color:#fff;padding:10px 14px;border-radius:8px;font-weight:600}button.secondary{background:#e5e7eb;border:none;color:#0f172a;padding:10px 14px;border-radius:8px;font-weight:600}.alert{padding:10px 12px;border-radius:8px;margin-top:12px}.alert.error{background:#fee2e2;color:#991b1b}.alert.success{background:#dcfce7;color:#166534}