body{font-family:Arial;background:#f4f6fb;margin:0}.login{display:flex;height:100vh;align-items:center;justify-content:center;background:#10182d}.box{background:white;padding:35px;border-radius:15px;width:320px;text-align:center}input,button{width:90%;padding:12px;margin:8px;border-radius:8px;border:1px solid #ddd}button{background:#5146e5;color:white;border:0}.sidebar{position:fixed;width:220px;height:100%;background:#5b1018;color:white;padding:20px}.sidebar a{display:block;color:white;padding:15px;text-decoration:none}.content{margin-left:260px;padding:30px}.card{display:inline-block;background:white;padding:25px;margin:10px;border-radius:12px;width:200px}.green{color:green}.red{color:red}.err{color:red}