body{margin:0;font-family:Arial,Helvetica,sans-serif;background:#f3f6fb;color:#0f172a}.nav{background:#0f172a;color:white;padding:14px;display:flex;gap:18px;align-items:center}.nav a{color:white;text-decoration:none}.wrap{max-width:1150px;margin:35px auto;padding:0 20px}.card{background:white;border-radius:12px;padding:22px;margin:16px 0;box-shadow:0 6px 18px #0001}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.stat{font-size:30px;font-weight:bold}input,select,button{padding:10px;margin:6px 0;border:1px solid #cbd5e1;border-radius:8px}button,.btn{background:#2563eb;color:white;border:0;cursor:pointer;text-decoration:none;display:inline-block;padding:10px 14px;border-radius:8px}table{width:100%;border-collapse:collapse;background:white}td,th{padding:12px;border-bottom:1px solid #e2e8f0;text-align:left}.paybox{max-width:360px;margin:60px auto;background:#00d64f;color:white;border-radius:25px;padding:24px;text-align:center}.paybox input{font-size:30px;width:85%;text-align:center}.err{color:red}.ok{color:green}