body,html{margin:0;padding:0;font-family:Arial,sans-serif;background-color:#f4f4f4;height:100%;display:flex;align-items:center;justify-content:center}.login-container{background:#fff;border-radius:10px;box-shadow:0 4px 10px rgba(0,0,0,.1);padding:30px;max-width:600px;width:400px;text-align:center}.logo img{width:150px;margin-bottom:20px}.message-error{background:#db9d9d;width:100%;height:40px;color:#575454;align-content:center;vertical-align:middle;font-weight:700}h1{font-size:24px;margin-bottom:20px;color:#333}.input-group{margin-bottom:15px;text-align:left}.input-group label{display:block;font-size:14px;margin-bottom:5px;color:#555}.input-group input{width:100%;padding:10px;border:1px solid #ccc;border-radius:5px;font-size:14px}.btn-signin{width:100%;padding:10px;border:none;background-color:#007bff;color:#fff;border-radius:5px;font-size:16px;cursor:pointer;transition:background-color .3s ease}.btn-signin:hover{background-color:#0056b3}